Mitsubishi Electric Smart Multi MXZ-SM36NAM-U1 Data Book page 17

7. CAPACITY TABLES
(7) Comparison with Essential Load
Against the essential load 30.3 kBtu/h, the maximum system capacity is 32.4 kBtu/h: Proper outdoor units have been selected.
(8) Calculation of Maximum Indoor Unit Capacity of Each Room
CTx = CTi, thus, calculate by the calculation below
Room1
Indoor Unit Rating × Indoor Design Temperature Correction
= 15.0 × 1.02
= 15.3 kBtu/h
Room2
Indoor Unit Rating × Indoor Design Temperature Correction
= 18.0 × 0.95
= 17.1 kBtu/h
Go on to the heating trial calculation since the selected units fulfill the cooling loads of Room 1, 2.
<Heating>
Outdoor Design Wet Bulb Temperature
Total Heating Load
Room1
Indoor Design Dry Bulb Temperature
Heating Load
Room2
Indoor Design Dry Bulb Temperature
Heating Load
<Other>
Indoor/Outdoor Equivalent Piping Length
Capacity of indoor unit
Model Number
Model 04 Model 05 Model 06 Model 08 Model 12 Model 15 Model 18 Model 24 Model 27 Model 30 Model 36 Model 48 Model 54
for indoor unit
Model
4.5
Capacity
Model
name
06 09 12
SVZ - - 12.0
SLZ-KF - 10.2 13.7
SEZ-KD - 10.9 13.6
MFZ-KJ - 10.9 13.0
MLZ-KP - 10.9 13.0
MSZ-FH 6.0 10.9 13.6
MSZ-FS 6.0 10.9 13.6
MSZ-GL 6.0 10.9 14.4
MSZ-EF - 10.9 13.0
PEAD - 10.9 13.5
PLA - - 13.5
2. Heating Calculation
(1) Temporary Selection of Indoor Units
Room1
PEFY-P15
Room2
PEFY-P18
(2) Total Indoor Units Capacity
P15 + P18 = P33
(3) Selection of Outdoor Unit
The P36 outdoor unit is selected as total indoor units capacity is P33
MXZ-SM36NAM
(4) Total Indoor Units Capacity Correction Calculation
Room1
Indoor Design Dry Bulb Temperature Correction (69.8ºF)
Room2
Indoor Design Dry Bulb Temperature Correction (73.4ºF)
CT
= 35.4 kBtu/h
M-P0855
OK: fulfills the load 13.6 kBtu/h
OK: fulfills the load 16.7 kBtu/h
Design Condition
5.6 6.7 9.0 13.5
Capacity class
15 18 24 30 36
- 18.0 27.0 34.0 40.0
17.1 - - - -
18.0 17.2 - - -
18.0 21.0 - - -
- 21.0 - - -
18.0 20.3 - - -
18.0 20.3 - - -
18.0 21.6 27.6 - -
18.0 21.0 - - -
15.7 18.0 26.0 34.0 40.0
- 18.0 26.0 34.0 40.0
17.0 kBtu/h (Rated)
20.0 kBtu/h (Rated)
42.0 kBtu/h
35.6ºF (2.0ºC)
34.4 kBtu/h
69.8ºF (21.0ºC)
16.3 kBtu/h
73.4ºF (23.0ºC)
18.1 kBtu/h
328 ft
17.0 20.0 27.0 30.0
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
59 60.8 62.6 64.4 66.2
15 16
Figure 4 Indoor unit temperature correction
To be used to correct indoor unit only
1.4
1.3
1.2
1.1
1.0
1.00 (Refer to Figure 4)
0.9
0.8
0.7
0.6
0.92 (Refer to Figure 4)
0.5
0.4
-13
-25
Figure 5 Outdoor unit temperature correction
To be used to correct outdoor unit only
34.0 40.0 54.0
68 69.8 71.6 73.4 75.2 77 78.8 80.6 [°F D.B.]
17 18 19 20 21 22 23 24 25 26 27 [°C D.B.]
Indoor Temperature
21.1°C (70.0°F) D.B.
-4 5 14 23 32 41 50 59
15
-20 -15 -10 -5 0 5 10
Outdoor Temperature
S-Series
(kBtu/h)
60.0
Indoor
Temperature
[°F W.B.]
[°C W.B.]
15